CK-12 Foundation
Ck 12: Episd: Natural Selection
[Free Registration/Login may be required to access all resource tools.] Understand what natural selection is and how it works and explain how new species originate.
Science Education Resource Center at Carleton College
Serc: Investigating Observing Stabilizing and Directional Selection
In this biology lab learners will compare two sample populations of sunflower seeds. Comparison of the two populations will be done through the generation of a histogram for each population. One population will be black oil sunflower...
Estrella Mountain Community College
Online Biology Book: The Modern View of Evolution
Take a closer look into the modern view of evolution. This article includes many pieces of evidence, all which support the theory of evolution.
CK-12 Foundation
Ck 12: Biology: Natural Selection
[Free Registration/Login may be required to access all resource tools.] Describes how natural selection changes allele frequency.
BiologyWise
Biology Wise: Definition and Examples of Stabilizing Selection
Explains what stabilizing selection is and how this type of natural selection actually limits genetic diversity in a population. Presents examples of stabilizing selection in different plants and animals.